tryout for substitute launch argument - fails

[knmcguire]

Trying to solve #430, however this doesn't work due to this error:

ros2 launch crazyflie launch.py backend:=sim config_folder:='/home/kimberly/Documents/csw2_config'
[INFO] [launch]: All log files can be found below /home/kimberly/.ros/log/2024-03-07-16-36-11-797281-pop-os-10935
[INFO] [launch]: Default logging verbosity is set to INFO
<launch.substitutions.launch_configuration.LaunchConfiguration object at 0x7954fb6c7af0>
[ERROR] [launch]: Caught exception in launch (see debug for traceback): Caught exception when trying to load file of format [py]: expected str, bytes or os.PathLike object, not LaunchConfiguration

[whoenig]

perhaps https://github.com/ros2/launch/blob/master/launch/launch/substitutions/path_join_substitution.py helps, but this whole substitution business is pretty tricky and very user-unfriendly. My guess is that it's so complicated because launch files can be in principle also *.yaml and *.xml files.

[knmcguire]

aha good tip. but yes it does not seem logical at all...